15797990 has 16 divisors (see below), whose sum is σ = 30624048. Its totient is φ = 5833056.

The previous prime is 15797983. The next prime is 15797993. The reversal of 15797990 is 9979751.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15797993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60632 + ... + 60891.

It is an arithmetic number, because the mean of its divisors is an integer number (1914003).

Almost surely, 2^15797990 is an apocalyptic number.

15797990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15797990 is a deficient number, since it is larger than the sum of its proper divisors (14826058).

15797990 is a wasteful number, since it uses less digits than its factorization.

15797990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121543.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 15797990 is about 3974.6685396395. The cubic root of 15797990 is about 250.9192292610.

The spelling of 15797990 in words is "fifteen million, seven hundred ninety-seven thousand, nine hundred ninety".